This is the only movie in the film series in which Chad's father appears. He is played by David Reivers, the real-life father of Corbin Bleu. They have played father and son in two other TV films, Jump In! (2007) and Free Style (2008).
Special copies of Teen Magazine and Seventeen Magazine were made for the "I Want it All" number. They feature Ashley Tisdale on the cover (replicas of their previous releases) and have the name "Sharpay" inserted where Ashley's name was previously.
Lucas Grabeel apparently pushed for Ryan to come out as gay in this film. However, being a Disney film, the prospect of an openly gay character was shot down, and instead Ryan is shown as possibly developing a romance with Kelsi.
Eleven original songs (including "Just Getting Started", which was in the end credits, but not on the soundtrack) were among the 49 songs eligible for an Oscar in a list released on Dec. 16, 2008 by the Academy of Motion Picture Arts and Sciences. None of them made the three nominees though.
During the final performance of 'High School Musical', Sharpay does a jazz square while singing. In the first High School Musical movie, while Sharpay and Ryan are performing 'What I've Been Looking For', Sharpay scolded Ryan for doing an unrehearsed jazz square, to which he replies, "It's a crowd favorite; everyone loves a good jazz square."
During the credits, while the outtakes play, there's yearbook signatures from the cast one the screen. They read as follows: Once a Wildcat, always a Wildcat -Troy To everyone at East High, you are the music in me -Gabriella It's not over yet! -Sharpay Off on a quest for the perfect jazz square! -Ryan You should visit me at the Oval Office -Taylor What team? Wildacts! Get'cha head in the game -Chad Long live musicals! -Kelsi I did it! I really did it! -Jason All things sweet -Zeke Remember, Wildcats, BIG things are possible! Good luck! -Martha Game on Sharpay! -Tiara Now it's all on me -Jimmie Brava! Bravo! -Miss Darbus Way to go team! -Coach Bolton.
the winner of ABC's summer reality show, High School Musical: Get in the Picture (2008) appears in a music video that is shown over the end credits of the theatrical release of the film. The show's other 11 finalists were featured in the music video as well.
The trivia item below may give away important plot points.
The schools each character is going to, and their major: Troy: Berkeley, Theatre (basketball scholarship) Gabriella: Stanford, Pre-law Chad: University Of Albuquerque, Undecided (basketball scholarship) Taylor: Yale, Political Science Sharpay: University of Albuquerque, Theatre Ryan: Juilliard, Choreography Kelsi: Juilliard, Music/Songwriting